Question

assuming :

T1 = 298°k

p1= 101Kpa

compression ratio 8.8

air fuel ratio = 15

displcement 242 cu in.

6cylinder

Step 5: Otto/Diesel Cycle Approximation, Conduct a thermodynamic analysis (temp and pressure at each state) using the appropriate idealized cycle (Otto or Diesel) and cold air standard assumptions. State 1 should be approximately ambient (unless turbo/supercharged) and state 2 can be found using your compression ratio and isentropic relationships. State 3 carn be found using the heat input from Step 4 at either constant volume (Otto) or constant pressure (Diesel) approximations. Note that the total heat input per cycle will have to be divided by the cylinder air mass in order to be compatible with the specific enthalpy/internal energy State 4 can found from isentropic relationships and the compression (and cutoff for diesel) ratio. Draw the be resulting cycle on PV and TS diagrams

Answer 1

242 in take otto cycle 2- 8p 3S

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